EP3097281A1 - Transmission assembly for a mechanically controllable valve train, and mechanically controllable valve train - Google Patents

Transmission assembly for a mechanically controllable valve train, and mechanically controllable valve train

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Publication number
EP3097281A1
EP3097281A1 EP14792446.8A EP14792446A EP3097281A1 EP 3097281 A1 EP3097281 A1 EP 3097281A1 EP 14792446 A EP14792446 A EP 14792446A EP 3097281 A1 EP3097281 A1 EP 3097281A1
Authority
EP
European Patent Office
Prior art keywords
transmission
controllable valve
mechanically controllable
members
gas exchange
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP14792446.8A
Other languages
German (de)
French (fr)
Other versions
EP3097281B1 (en
Inventor
Stephan Schmitt
Peter Haushälter
Markus ILBERTZ
Manuel SEIBEL
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pierburg GmbH
Original Assignee
Pierburg GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pierburg GmbH filed Critical Pierburg GmbH
Publication of EP3097281A1 publication Critical patent/EP3097281A1/en
Application granted granted Critical
Publication of EP3097281B1 publication Critical patent/EP3097281B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
    • F01L13/0063—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque by modification of cam contact point by displacing an intermediate lever or wedge-shaped intermediate element, e.g. Tourtelot
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/20—Adjusting or compensating clearance
    • F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/12—Transmitting gear between valve drive and valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/14—Tappets; Push rods
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/18—Rocking arms or levers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/08—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for interconverting rotary motion and reciprocating motion
    • F16H25/10—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for interconverting rotary motion and reciprocating motion with adjustable throw

Definitions

  • the invention relates to a transmission arrangement for a mechanically controllable valve drive, which has at least two transmission elements, wherein the transmission elements are designed such that they are directly or indirectly via coupling means in each case with a gas exchange valve in operative connection and wherein the transmission elements in a link module by means of bearing members in a link arrangement are movably mounted, wherein the transmission members are further connected via Nocken vinylrollorgane with a camshaft in operative connection and wherein a Ventilhubverstell sensible is provided for setting different maximum strokes of the respective gas exchange valve, wherein at least one bearing member and Nocken vinylrollorgane are mounted on a rotation axis. Furthermore, the invention relates to a mechanically controllable valve drive with such a transmission arrangement.
  • An exemplary transmission arrangement for the "UniValve" system is known from DE 10 2007 022 266 AI, in which the transmission arrangement has two transmission elements, each of which act on a gas exchange valve in a known manner
  • the respective maximum stroke is in this case adjustable by a valve stroke adjusting device, which in turn acts on the respective transmission element in DE 10 2007 022 266 A1 Ventilhubverstell issued formed as an eccentric shaft.
  • the transmission arrangement is in this case movably mounted in the cylinder head via a bearing member rolling in a slide track.
  • This bearing member is arranged on an axis on which the Nockenenburgrollorgane are provided. It has now been found that this axis can bend as a result of valve spring forces acting on the respective transmission members, which can lead to increased wear of the transmission arrangement.
  • the bearing member acts as an abutment in certain load situations and accordingly the efficiency of the internal combustion engine is reduced, which leads to increased fuel consumption.
  • the object of the invention is therefore to avoid the above-mentioned disadvantages in a simple and cost-effective manner and to help in the realization of maximum potentials.
  • all bearing members are arranged in series successively.
  • the outer bearing members may extend above the cam follower rollers when the transfer member is redesigned.
  • the object is further achieved by a mechanically controllable valve drive with such a transmission arrangement, wherein at least two gas exchange valves arranged in series is assigned a transmission arrangement.
  • FIG. 1 shows a perspective illustration of an inventive mechanically controllable valve drive
  • FIG. 2 shows a sectional view of a first embodiment of an inventive transmission arrangement
  • Figure 3 is a perspective view of slide tracks of Figure 2
  • Figure 4 is a sectional view of a second embodiment of an inventive transmission arrangement.
  • Figure 1 shows a perspective view of a mechanically controllable valve train 10 with a plurality of gas exchange valves arranged in series 12, 14, 16, 18, 20, 22, 24 and 26.
  • the mechanically controllable valve train 10 has in the present case four transmission arrangements 29, 31, 33 and 35, which in each case two gas exchange valves 12, 14; 16, 18; 20, 22; and 24, 26 are assigned.
  • a bearing member 36 is exemplarily shown for the transfer assembly 35, with which a rotation axis 38 of the transfer assembly 35 rolls in a known manner in a slide track, not shown in this view.
  • each transmission assembly 29, 31, 33 and 35 are in known manner with a camshaft 40 in operative connection.
  • each transmission assembly 29, 31, 33 and 35 by adjusting members 42, 43; 44, 45; 46, 47 and 48, 49 of a Ventilhubverstell sensible 41 can be controlled such that a lesser or greater maximum stroke of the gas exchange valves 12, 14; 16, 18; 20, 22; 24, 26 is adjustable.
  • the adjusting members 42, 43, 44, 45, 46, 47 and 48, 49 respectively the intake valves 12, 14; 16, 18; 20, 22 and 24, 26 assigned and executed as Exzenterorgane, which are provided on an eccentric shaft 50 and act on not shown attacking organs in a known manner.
  • the eccentric shaft 50 is drivable in the present embodiment by a drive member 52 in a known manner.
  • the transmission assembly 35 acts in the present case on pivot lever assemblies 54 and 56, wherein a transmission member 58 shown by means of a working curve in operative connection with the pivot lever assembly 56 and wherein the pivot lever assembly 56 engages with an end face on the gas exchange valve 26.
  • FIG. 2 now shows a transmission arrangement 60 according to the invention which can replace the transmission arrangements 29, 31, 33 and 35 shown in FIG.
  • the transmission arrangement 60 has the transmission element 58, known from FIG. 1, and a second transmission element 62, which via a pivot lever arrangement 56 in FIG Active connection with the gas exchange valve 24 of Figure 1 is.
  • On axes of rotation 64 not shown adjusting organs are mounted in a known manner, which cooperate with the eccentric shaft 50 of Figure 1.
  • Both transmission members 58, 62 are arranged on the axis of rotation 38, wherein each transmission member 58, 62 has a Nocken mergeorgan 66, 68, which are respectively mounted by needle bearings 70, 72 on the axis of rotation 38 and are driven by the camshaft 40.
  • the transmission arrangement 60 has three bearing elements 74, 76 and 78, which likewise consist of a roller 75 and a needle bearing 77 and over which the transmission arrangement 60 rolls in corresponding slide tracks 80, 82 and 84.
  • the slide tracks 80, 82 and 84 are combined in a gate module 90 provided.
  • the link module 90 is in this case provided in a known manner in a cylinder head not shown.
  • the two outer scenes 80, 84 can be designed according to the distribution of force and the available space in demand-width. Furthermore, see in particular Figure 3, the outer slide tracks 80, 84 on the respective outer side guide edges 86, 88, which ensure an axial guidance of the transmission module 60.
  • FIG. 4 now shows a sectional view of a second embodiment of an inventive transmission arrangement, which has the advantage of a smaller required installation space.
  • transfer members 92, 94 are formed extended on the side facing the sliding module 90, whereby it is possible, above the Nockenfolderollorgane 66, 68 bearing members 98, 100 on a rotation axis 102, 104 to arrange, which in turn roll on cam tracks 80, 84.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Valve Device For Special Equipments (AREA)

Abstract

The invention relates to a transmission assembly for a mechanically controllable valve train (10), having at least two transmission elements (58,62), wherein the transmission elements (58, 62) are designed in such a way that they are each, directly or indirectly via coupling means (54, 56), in operative connection with a gas exchange valve (24, 26), wherein the transmission elements (58, 62) are mounted in a slotted guide module (90) by means of mounting members (74, 76, 78) in a slotted guide system (80, 82, 84) and said transmission elements (58, 62) are also in operative connection with a camshaft (40) via cam following roller elements (66, 68), and wherein a valve stroke adjustment device for setting different maximum strokes of each gas exchange valve (24, 26) is provided. At least one mounting member (74, 76, 78, 98, 100) and cam following roller element (66, 68) are mounted on an axis of rotation (38) and each cam following roller element (66, 68) is assigned two mounting members (74, 76, 78, 98, 100), in such a way that the rigidity of the axis of rotation (38) is increased.

Description

B E S C H R E I B U N G Übertragungsanordnung für einen mechanisch steuerbaren  B E S C H R E I B U N G Transmission arrangement for a mechanically controllable
Ventiltrieb sowie mechanisch steuerbarer Ventiltrieb  Valve gear and mechanically controllable valve train
Die Erfindung betrifft eine Übertragungsanordnung für einen mechanisch steuerbaren Ventiltrieb, die mindestens zwei Übertragungsglieder aufweist, wobei die Übertragungsglieder derart ausgeführt sind, dass sie direkt oder indirekt über Koppelmittel mit jeweils einem Gaswechselventil in Wirkverbindung stehen und wobei die Übertragungsglieder in einem Kulissenmodul mittels Lagerorganen in einer Kulissenanordnung beweglich gelagert sind, wobei die Übertragungsglieder des Weiteren über Nockenfolgerollorgane mit einer Nockenwelle in Wirkverbindung stehen und wobei eine Ventilhubverstelleinrichtung zur Einstellung von verschiedenen Maximalhüben des jeweiligen Gaswechselventils vorgesehen ist, wobei mindestens ein Lagerorgan und Nockenfolgerollorgane auf einer Drehachse gelagert sind. Des Weiteren betrifft die Erfindung einen mechanisch steuerbaren Ventiltrieb mit einer derartigen Übertragungsanordnung. The invention relates to a transmission arrangement for a mechanically controllable valve drive, which has at least two transmission elements, wherein the transmission elements are designed such that they are directly or indirectly via coupling means in each case with a gas exchange valve in operative connection and wherein the transmission elements in a link module by means of bearing members in a link arrangement are movably mounted, wherein the transmission members are further connected via Nockenfolgerollorgane with a camshaft in operative connection and wherein a Ventilhubverstelleinrichtung is provided for setting different maximum strokes of the respective gas exchange valve, wherein at least one bearing member and Nockenfolgerollorgane are mounted on a rotation axis. Furthermore, the invention relates to a mechanically controllable valve drive with such a transmission arrangement.
Eine beispielhafte Übertragungsanordnung für das System„UniValve" ist aus der DE 10 2007 022 266 AI bekannt. Hierbei weist die Übertragungsanordnung zwei Übertragungsglieder auf, die jeweils auf bekannte Weise auf ein Gaswechselventil einwirken. Hierzu ist ein oberes Nockenfolgerollorgan jeweils durch eine Nockenwelle antreibbar, so dass das Gaswechselventil zwischen einem voreingestellten Maximalhub und einem Minimalhub oder auch Nullhub geöffnet bzw. geschlossen wird. Der jeweilige Maximalhub ist hierbei durch eine Ventilhubverstelleinrichtung einstellbar, die ihrerseits hierzu auf das jeweilige Übertragungsglied einwirkt. In der DE 10 2007 022 266 AI ist die Ventilhubverstelleinrichtung als Exzenterwelle ausgebildet. Die Übertragungsanordnung ist hierbei über ein in einer Kulissenbahn abrollendes Lagerorgan im Zylinderkopf beweglich gelagert. Dieses Lagerorgan ist dabei auf einer Achse angeordnet, auf der auch die Nockenfolgerollorgane vorgesehen sind . Es hat sich nun herausgestellt, dass diese Achse sich in Folge von Ventilfederkräften, die auf die jeweiligen Übertragungsglieder einwirken, durchbiegen kann, wodurch es zu einem erhöhten Verschleiß der Übertragungsanordnung kommen kann . Gleichzeitig führt eine derartige Situation dazu, dass in bestimmten Lastsituationen das Lagerorgan als Widerlager wirkt und dementsprechend die Effizienz der Brennkraftmaschine verringert wird, was zu erhöhten Kraftstoffverbrauch führt. An exemplary transmission arrangement for the "UniValve" system is known from DE 10 2007 022 266 AI, in which the transmission arrangement has two transmission elements, each of which act on a gas exchange valve in a known manner The respective maximum stroke is in this case adjustable by a valve stroke adjusting device, which in turn acts on the respective transmission element in DE 10 2007 022 266 A1 Ventilhubverstelleinrichtung formed as an eccentric shaft. The transmission arrangement is in this case movably mounted in the cylinder head via a bearing member rolling in a slide track. This bearing member is arranged on an axis on which the Nockenfolgerollorgane are provided. It has now been found that this axis can bend as a result of valve spring forces acting on the respective transmission members, which can lead to increased wear of the transmission arrangement. At the same time, such a situation results in that the bearing member acts as an abutment in certain load situations and accordingly the efficiency of the internal combustion engine is reduced, which leads to increased fuel consumption.
Aufgabe der Erfindung ist es daher, die oben genannten Nachteile auf einfache und kostengünstige Weise zu vermeiden sowie bei der Realisierung der maximalen Potentiale zu helfen. The object of the invention is therefore to avoid the above-mentioned disadvantages in a simple and cost-effective manner and to help in the realization of maximum potentials.
Diese Aufgabe wird dadurch gelöst, dass einem Nockenfolgerollorgan jeweils zwei Lagerorgane zugeordnet sind, derart, dass die Steifigkeit der Drehachse erhöht ist. Durch eine derartige Zuordnung wird ein Durchbiegen der Drehachse wirksam verhindert. Hierdurch wird die Steifigkeit des Gesamtsystems des Ventiltriebs, die eine grundlegende Voraussetzung für die Ventiltriebsdynami k, die Drehzahlfestigkeit und die maximal darstellbaren Ventilbeschleunigung und damit das Potenzial zur Optimierung des Verbrennungsmotors hinsichtlich Leistungs- und Verbrauchsverhalten darstellt, verbessert. Weiterhin ist eine Optimierung des Kraftstoffverbrauches durch höhere Öffnungs- und Schließbeschleunigungen möglich . Daraus ergeben sich auf bekannte Weise eine Optimierung der CO2-Emissionen sowie eine Leistungs- und Drehmomentsteigerung der Brennkraftmaschine. In vorteilhafter Weise weisen die äußeren Kulissenbahnen an der jeweiligen Außenseite gelegene Führungskanten auf, wodurch eine Aufnahme von auf die Drehachse wirkenden Axialkräfte möglich ist. This object is achieved in that a Nockenfolgerollorgan each two bearing members are assigned, such that the rigidity of the axis of rotation is increased. By such an assignment, a bending of the axis of rotation is effectively prevented. As a result, the rigidity of the overall system of the valve train, which represents a fundamental prerequisite for the valve train dynamics k, the speed stability and the maximum representable valve acceleration and thus the potential for optimizing the internal combustion engine in terms of power and consumption behavior, improved. Furthermore, an optimization of the fuel consumption by higher opening and closing accelerations is possible. This results in a known manner, an optimization of CO2 emissions and a performance and torque increase of the internal combustion engine. Advantageously, the outer slide tracks located at the respective outer side Leading edges, whereby a recording of axial forces acting on the axis of rotation is possible.
In vorteilhafter Weise sind alle Lagerorgane in Reihe aufeinanderfolgend angeordnet. Alternativ können die äußeren Lagerorgane oberhalb der Nockenfolgerollorgane verlaufen bei umgestaltetem Übertragungsglied . Advantageously, all bearing members are arranged in series successively. Alternatively, the outer bearing members may extend above the cam follower rollers when the transfer member is redesigned.
Die Aufgabe wird weiterhin gelöst durch einen mechanisch steuerbaren Ventiltrieb mit einer derartigen Übertragungsanordnung, wobei mindestens zwei in Reihe angeordneten Gaswechselventilen eine Übertragungsanordnung zugeordnet ist. The object is further achieved by a mechanically controllable valve drive with such a transmission arrangement, wherein at least two gas exchange valves arranged in series is assigned a transmission arrangement.
Die Erfindung wird nachfolgend anhand einer Zeichnung näher erläutert, hierbei zeigt: The invention will be explained in more detail with reference to a drawing, in which:
Figur 1 eine perspektivische Darstellung eines erfinderischen mechanisch steuerbaren Ventiltriebs, FIG. 1 shows a perspective illustration of an inventive mechanically controllable valve drive,
Figur 2 eine Schnittansicht einer ersten Ausführungsform einer erfinderischen Übertragungsanordnung, FIG. 2 shows a sectional view of a first embodiment of an inventive transmission arrangement,
Figur 3 eine perspektivische Ansicht von Kulissenbahnen aus Figur 2, und Figure 3 is a perspective view of slide tracks of Figure 2, and
Figur 4 eine Schnittansicht einer zweiten Ausführungsform einer erfinderischen Übertragungsanordnung . Figure 4 is a sectional view of a second embodiment of an inventive transmission arrangement.
Figur 1 zeigt eine perspektivische Ansicht eines mechanisch steuerbaren Ventiltriebs 10 mit mehreren in Reihe angeordneten Gaswechselventilen 12, 14, 16, 18, 20, 22, 24 und 26. Im vorliegenden Ausführungsbeispiel sind jeweils zwei Einlaßgaswechselventile einem Zylinder der Brennkraftmaschine zugeordnet. Der mechanisch steuerbare Ventiltrieb 10 weist im vorliegenden Fall vier Übertragungsanordnungen 29, 31 , 33 und 35 auf, denen jeweils zwei Gaswechselventile 12, 14; 16, 18; 20, 22; und 24, 26 zugeordnet sind . In der vorliegenden Ansicht ist für die Übertragungsanordnung 35 exemplarisch ein Lagerorgan 36 dargestellt, mit dem eine Drehachse 38 der Übertragungsanordnung 35 in einer in dieser Ansicht nicht weiter dargestellten Kulissenbahn auf bekannte Weise abrollt. Darüber hinaus stehen die Übertragungsanordnungen 29, 31, 33 und 35 auf bekannte Weise mit einer Nockenwelle 40 in Wirkverbindung . Außerdem ist jede Übertragungsanordnung 29, 31 , 33 und 35 durch Verstellorgane 42, 43 ; 44, 45 ; 46, 47 und 48, 49 einer Ventilhubverstelleinrichtung 41 derart ansteuerbar, dass ein geringerer oder höherer Maximalhub der Gaswechselventile 12, 14; 16, 18; 20, 22; 24, 26 einstellbar ist. Im vorliegenden Ausführungsbeispiel sind die Verstellorgane 42, 43, 44, 45, 46, 47 und 48, 49 jeweils den Einlassventilen 12, 14; 16, 18; 20, 22 und 24, 26 zugeordnet und als Exzenterorgane ausgeführt, die auf einer Exzenterwelle 50 vorgesehen sind und auf nicht weiter dargestellte Angriffsorgane auf bekannte Weise einwirken. Die Exzenterwelle 50 ist im vorliegenden Ausführungsbeispiel durch ein Antriebsorgan 52 auf bekannte Weise antreibbar. Die Übertragungsanordnung 35 wirkt im vorliegenden Fall auf Schwenkhebelanordnungen 54 und 56 ein, wobei ein dargestelltes Übertragungsglied 58 mittels einer Arbeitskurve in Wirkverbindung mit der Schwenkhebelanordnung 56 steht und wobei die Schwenkhebelanordnung 56 mit einer Stirnfläche auf das Gaswechselventil 26 angreift. In Folge von Ventilfederkräften kann es in bestimmten Lastsituationen zu einer Durchbiegung der Drehachse 38 mit den verbundenen Nachteilen kommen . Figure 1 shows a perspective view of a mechanically controllable valve train 10 with a plurality of gas exchange valves arranged in series 12, 14, 16, 18, 20, 22, 24 and 26. In the present embodiment, two intake gas exchange valves are assigned to a cylinder of the internal combustion engine. The mechanically controllable valve train 10 has in the present case four transmission arrangements 29, 31, 33 and 35, which in each case two gas exchange valves 12, 14; 16, 18; 20, 22; and 24, 26 are assigned. In the present view, a bearing member 36 is exemplarily shown for the transfer assembly 35, with which a rotation axis 38 of the transfer assembly 35 rolls in a known manner in a slide track, not shown in this view. In addition, the transmission assemblies 29, 31, 33 and 35 are in known manner with a camshaft 40 in operative connection. In addition, each transmission assembly 29, 31, 33 and 35 by adjusting members 42, 43; 44, 45; 46, 47 and 48, 49 of a Ventilhubverstelleinrichtung 41 can be controlled such that a lesser or greater maximum stroke of the gas exchange valves 12, 14; 16, 18; 20, 22; 24, 26 is adjustable. In the present embodiment, the adjusting members 42, 43, 44, 45, 46, 47 and 48, 49 respectively the intake valves 12, 14; 16, 18; 20, 22 and 24, 26 assigned and executed as Exzenterorgane, which are provided on an eccentric shaft 50 and act on not shown attacking organs in a known manner. The eccentric shaft 50 is drivable in the present embodiment by a drive member 52 in a known manner. The transmission assembly 35 acts in the present case on pivot lever assemblies 54 and 56, wherein a transmission member 58 shown by means of a working curve in operative connection with the pivot lever assembly 56 and wherein the pivot lever assembly 56 engages with an end face on the gas exchange valve 26. As a result of valve spring forces, bending of the axis of rotation 38 with the associated disadvantages may occur in certain load situations.
Figur 2 zeigt nun eine erfindungsgemäße Übertragungsanordnung 60, die die in Figur 1 gezeigten Übertragungsanordnungen 29, 31, 33 und 35 ersetzen kann. Die Übertragungsanordnung 60 weist im vorliegenden Fall das aus Figur 1 bekannte Übertragungsglied 58 und ein zweites Übertragungsglied 62 auf, das über eine Schwenkhebelanordnung 56 in Wirkverbindung mit dem Gaswechselventil 24 aus Figur 1 steht. Auf Drehachsen 64 sind auf bekannte Weise nicht weiter dargestellte Verstellorgane gelagert, die mit der Exzenterwelle 50 aus Figur 1 zusammenwirken . Beide Übertragungsglieder 58, 62 sind auf der Drehachse 38 angeordnet, wobei jedes Übertragungsglied 58, 62 ein Nockenfolgerollorgan 66, 68 aufweist, die jeweils mittels Nadellager 70, 72 auf der Drehachse 38 gelagert sind und durch die Nockenwelle 40 antreibbar sind . Des Weiteren weist die Übertragungsanordnung 60 drei Lagerorgane 74, 76 und 78 auf, die ebenfalls aus einer Rolle 75 und einem Nadellager 77 bestehen und über die die Übertragungsanordnung 60 in entsprechenden Kulissenbahnen 80, 82 und 84 abrollt. Die Kulissenbahnen 80, 82 und 84 sind in einem Kulissenmodul 90 kombiniert vorgesehen. Hierdurch wird die effektive Steifigkeit der Drehachse 38 wesentlich erhöht. Das Kulissenmodul 90 ist hierbei auf bekannte Weise in einem nicht weiter dargestellten Zylinderkopf vorgesehen . FIG. 2 now shows a transmission arrangement 60 according to the invention which can replace the transmission arrangements 29, 31, 33 and 35 shown in FIG. In the present case, the transmission arrangement 60 has the transmission element 58, known from FIG. 1, and a second transmission element 62, which via a pivot lever arrangement 56 in FIG Active connection with the gas exchange valve 24 of Figure 1 is. On axes of rotation 64 not shown adjusting organs are mounted in a known manner, which cooperate with the eccentric shaft 50 of Figure 1. Both transmission members 58, 62 are arranged on the axis of rotation 38, wherein each transmission member 58, 62 has a Nockenfolgerollorgan 66, 68, which are respectively mounted by needle bearings 70, 72 on the axis of rotation 38 and are driven by the camshaft 40. Furthermore, the transmission arrangement 60 has three bearing elements 74, 76 and 78, which likewise consist of a roller 75 and a needle bearing 77 and over which the transmission arrangement 60 rolls in corresponding slide tracks 80, 82 and 84. The slide tracks 80, 82 and 84 are combined in a gate module 90 provided. As a result, the effective rigidity of the axis of rotation 38 is substantially increased. The link module 90 is in this case provided in a known manner in a cylinder head not shown.
Die beiden äußeren Kulissen 80, 84 können entsprechend der Kraftaufteilung und des verfügbaren Bauraums in bedarfsgerechter Breite ausgeführt sein . Weiterhin, siehe hierzu insbesondere Figur 3, können die äußeren Kulissenbahnen 80, 84 an der jeweiligen Außenseite Führungskanten 86, 88 aufweisen, die eine axiale Führung des Übertragungsmoduls 60 gewährleisten. The two outer scenes 80, 84 can be designed according to the distribution of force and the available space in demand-width. Furthermore, see in particular Figure 3, the outer slide tracks 80, 84 on the respective outer side guide edges 86, 88, which ensure an axial guidance of the transmission module 60.
Figur 4 zeigt nun eine Schnittansicht einer zweiten Ausführungsform einer erfinderischen Übertragungsanordnung, die den Vorteil eines geringeren benötigten Bauraumes aufweist. Hierzu sind Übertragungsglieder 92, 94 an dem zum Kulissenmodul 90 gerichteten Seite verlängert ausgebildet, wodurch es möglich ist, oberhalb der Nockenfolgerollorgane 66, 68 Lagerorgane 98, 100 auf einer Drehachse 102, 104 anzuordnen, die wiederum auf Kulissenbahnen 80, 84 abrollen. FIG. 4 now shows a sectional view of a second embodiment of an inventive transmission arrangement, which has the advantage of a smaller required installation space. For this purpose, transfer members 92, 94 are formed extended on the side facing the sliding module 90, whereby it is possible, above the Nockenfolderollorgane 66, 68 bearing members 98, 100 on a rotation axis 102, 104 to arrange, which in turn roll on cam tracks 80, 84.

Claims

P A T E N T A N S P R Ü C H E 1. Übertragungsanordnung für einen mechanisch steuerbaren Ventiltrieb, (10) die mindestens zwei Übertragungsglieder (58, 62) aufweist, wobei die Übertragungsglieder (58, 62) derart ausgeführt sind, dass sie direkt oder indirekt über Koppelmittel (54, 56) mit jeweils einem Gaswechselventil (24, 26) in Wirkverbindung stehen und wobei die Übertragungsglieder (58, 62) in einem Kulissenmodul (90) mittels Lagerorganen (74, 76, 78) in einer Kulissenanordnung (80, 82, 84) gelagert sind, wobei die Übertragungsglieder (58, 62) des Weiteren über Nockenfolgerollorgane (66, 68) mit einer Nockenwelle (40) in Wirkverbindung stehen und wobei eine Ventilhubverstelleinrichtung zur Einstellung von verschiedenen Maximalhüben des jeweiligen Gaswechselventils (24, 26) vorgesehen ist, wobei mindestens ein Lagerorgan (74, 76, 78, 98, 100) und Nockenfolgerollorgane (66, 68) auf einer Drehachse (38) gelagert sind, dadurch gekennzeichnet, dass einem Nockenfolgerollorgan (66, 68) jeweils zwei Lagerorgane ( 74, 76, 78, 98, 100) zugeordnet sind, derart, dass die Steifigkeit der Drehachse (38) erhöht ist.  1. A transmission arrangement for a mechanically controllable valve drive, (10) which has at least two transmission members (58, 62), wherein the transmission members (58, 62) are designed such that they are directly or indirectly connected via coupling means (54, 56). each with a gas exchange valve (24, 26) are in operative connection and wherein the transmission members (58, 62) in a link module (90) by means of bearing members (74, 76, 78) are mounted in a link arrangement (80, 82, 84) the transmission links (58, 62) are further operatively connected to a camshaft (40) via cam follower rollers (66, 68), and wherein a valve lift adjustment device is provided for setting various maximum strokes of the respective gas exchange valve (24, 26), at least one bearing element ( 74, 76, 78, 98, 100) and cam follower rollers (66, 68) are mounted on an axis of rotation (38), characterized in that a cam follower roller ( 66, 68) are each associated with two bearing members (74, 76, 78, 98, 100), such that the rigidity of the axis of rotation (38) is increased.
2. Übertragungsanordnung nach Anspruch 1, dadurch gekennzeichnet, dass die äußeren Kulissenbahnen (80, 84) an der jeweiligen Außenseite gelegene Führungskanten (86, 88) aufweisen. 2. Transmission arrangement according to claim 1, characterized in that the outer slide tracks (80, 84) located on the respective outer side guide edges (86, 88).
3. Übertragungsanordnung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass alle Lagerorgane (74, 76, 78) in Reihe aufeinanderfolgend angeordnet sind. Übertragungsanordnung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die äußeren Lagerorgane (98, 100) oberhalb der Nockenfolgerollorgane (66, 68) verlaufen. 3. Transmission arrangement according to claim 1 or 2, characterized in that all bearing members (74, 76, 78) are arranged in series successively. Transmission arrangement according to claim 1 or 2, characterized in that the outer bearing members (98, 100) extend above the cam follower rollers (66, 68).
Mechanisch steuerbarer Ventiltrieb mit einer Übertragungsanordnung nach einem der Ansprüche 1 - 4, dadurch gekennzeichnet, dass mindestens zwei in Reihe angeordneten Gaswechselventilen (24, 26) eine Übertragungsanordnung (60, 90) zugeordnet ist. Mechanically controllable valve drive with a transmission arrangement according to one of claims 1 to 4, characterized in that at least two gas exchange valves (24, 26) arranged in series are assigned a transmission arrangement (60, 90).
EP14792446.8A 2014-01-23 2014-10-28 Transmission assembly for a mechanically controllable valve train, and mechanically controllable valve train Not-in-force EP3097281B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014100748.4A DE102014100748B4 (en) 2014-01-23 2014-01-23 Transmission arrangement for a mechanically controllable valve train and mechanically controllable valve train
PCT/EP2014/073044 WO2015110189A1 (en) 2014-01-23 2014-10-28 Transmission assembly for a mechanically controllable valve train, and mechanically controllable valve train

Publications (2)

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EP3097281A1 true EP3097281A1 (en) 2016-11-30
EP3097281B1 EP3097281B1 (en) 2019-05-29

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US (1) US20170009609A1 (en)
EP (1) EP3097281B1 (en)
JP (1) JP6250815B2 (en)
KR (1) KR101849483B1 (en)
CN (1) CN105658918B (en)
DE (1) DE102014100748B4 (en)
WO (1) WO2015110189A1 (en)

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KR20160108543A (en) 2016-09-19
CN105658918B (en) 2019-10-01
EP3097281B1 (en) 2019-05-29
JP6250815B2 (en) 2017-12-20
DE102014100748B4 (en) 2017-04-27
KR101849483B1 (en) 2018-04-16
DE102014100748A1 (en) 2015-09-24
CN105658918A (en) 2016-06-08
JP2017503949A (en) 2017-02-02
US20170009609A1 (en) 2017-01-12
WO2015110189A1 (en) 2015-07-30

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